Same thing happening to me as well. I can be on the home page of my server and the page will refresh every 30 seconds. If i go to watch something, i get an error has occurred, refer to forums.
I can access my friends server from my account without any issues as well. I switched accounts to access my personal server and no issues. It appears this refresh / playback error is only with my main account that is connected to the plex media server. literally cant watch anything on my main account
